Tube-mill liner



i UNITED STATES MARTIN RODERICK OSHAUGHNESSY, OF COBALT, ONTARIO, CANADA.

TUBE-MILL LINER.

Specification of Letters Patent. Patented Mar, 175, 1921,

Application led December 1, 1919. Serial No. 341,652.

T 0 all whom t may concern:

Be it known that I, MARTIN RODERICK OSHAUGHNESSY, a subject of the King of Great Britain, and resident of Cobalt, in the Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Tube-Millk Liners, of which the following is a specification.

This invention relates to improvements in tube mill liners, and the objects of the invention are to provide a liner possessing exceptional life without in any way affecting the etliciency of the tube mill as a grinding machine, to so construct the liner that it will be uniformly chilled and so form a hard, wear proof liner, homogeneous throughout so that the life of the liner will be prolonged, t`o provide a liner with aY plurality of pockets designed to receive a mixed size grinding medium which will become attached for variable periods thereby protecting the liner against wear and increasing the etliciency, and at the same time exposing to the load a surface that prevents the load slipping in bulk, which slipping is an objectionable feature common to smooth surface liners and one that tends to cut the efliciency of the tube millas a grinding machine. l

Further objects are to render it possible to assemble a thick protective lining without manufacturing sections having excessive weighty in expensive materials such as chrome, manganese steel or other high priced'y metal, to facilitate securing the liner to the shell of the mill and generally to adapt the liner to better perform the functions required of it.

Vith the above and other objects in view the invention consists essentially of the improved construction hereinafter described and set forth in the following specification and accompanying drawings forming part of the same. Y

In the drawings:

Figure 1 is a transverse section of a tube mill equipped with my improved liner.

Fig. 2 is a fragmentary longitudinal section of a tube'mill equipped with my improved liner.

Fig. 3 is a side elevation of my improved liner.

Fig. 4 is an end elevation.

Like characters of reference refer to like parts in the several figures.

Referring to the drawings, A represents a tube mill of an usualdescription and B- the improved liner. y

The liner B is formed sectional; Each section is substantially rectangular in formation the inner and outer walls 10 of each section being curvilinear.v Y

The end walls of'eachsection are formed with flanges 12 land the longitudinal walls 13 are tapered and converge toward a common center, that is to say, the center of the tube mill. Each section is also provided with a plurality of pockets 14 substantially dove-tailed in cross section, the bottom of `the pocket being of larger area than the mouth of the pocket.

In this way a plurality of dividing walls 15 are formed between adjacent pockets which will retain for variable periods of time a mixed sized grinding medium so that the face of the liner is protected against abrasiveaction, and the material fed to the mill will be readily pulverized to an exceedingly ne degree. It will be Vunderstood that the mixed sized grinding medium in the pockets will become interchanged during the operation of the tube mill and this grinding medium prevents excessive wear of the liner and thus increases the life time of the same while at the same time it keeps exposed to the load a surface that prevents the load slipping in bulk7 which slipping would otherwise impair the efficiency of the tube mill. l' f The sections of my liner are arranged in the tube mill A as shown in Fig-2, that is to say the longitudinal edges abut with an adjacent section, and this forms a cylinder, and the flanges 12 on the ends abut with the flanges on the ends of adjacent sections, and form a suitable groove 16 in which an expansion ring 7 or other securing means may be located to hold the several sections of the liner in assembled position. Y

As a section becomes worn out it can be readily removed and replaced by another,

and as the section will be of stock size therev i formation of the pockets in the liner, the liner being so arranged that it can be mounted in position in a tube mill With a minimum of' time and labor.

As many changes could be made in the above `Construction, and many apparently widely different embodiments of my invention, Within the scope oi' the claim construetedvvitliout departing from the spirit or scope thereof, it is intended that ,all matter contained in the accompanying specification and drawings shall be interpreted as illustrative, and not in a limiting sense.

What I Claim as my invention is:

A liner of the class described comprising a plurality of sections, eaehgsection being formed With end flanges and designed to be arranged in cylindrical formation With the longitudinal edges abutting, and the end flanges ot' the adjacent cylindrical series abutting to form arcuate grooves, the inner Wall of each liner section having pockets with eonstrieted openings, the Walls of the pocket being under-eut and diver-ging on all of its sides, and a split ring located in the groove eoacting with the end flanges, as and for4 the purpose speeilied.

MARTIN normalen osHAueHNEssY.

TWitnesses; Y

EDWIN AroHisoN,

V.V BARBER. 

